Bar's Leaks Original Pelletized Formula Heavy-Duty Stop Leak, 11 oz

This stuff is the best for radiator leaks. Always keep it on hand in your car. It will safe someone's day.

Great product, delivered on time and at an affordable price. Been using this product for years.

My review is not incentivized. This stuff really works. My cobalt was leaking antifreeze so bad to where my coolant would be completely empty after filling it completely full within 2-4 days depending on how much I was driving and would still leak even if it was just parked. I have tried other liquid type stop leaks on other vehicles in the past with no luck so after finding this pellet type I figured I'd give it a try before I took it into the shop. I only used half the bottle as directed and then immediately took my car on a about a 30 min drive around town to let the pellets have time to melt and seal holes. Over a month later now I still haven't had any leaking issues since. I will definitely recommend this product to everyone I know. You can't beat the price for it either.

Didn't work on mine when I had a radiator leak so severe that it drained completely within a few minutes. But for a smaller leak this should work well. The pellets will clog up any small holes.

I decided to give this a try when my radiator was leaking after a run in with a snow bank. That was 2 months ago and its still going. It is gradual, it may take a few times of driving before it completely seals.

Fixed my minor radiator leak in not sure about bigger leaks, but this solved my issue for under the $5 range!

Shake , pour into radiator, still had pellets in bottle so use a little water to get them all out. Seems to of worked the car is a 1992 madel.

EASY PICKUP LOCAL PRODUCT SEEMS TO BE DOING THE STOP LEAK // CONDITIONING AS PER WEBSITE HAS FOR SOME TIME THKS DH DH DBW

had three different mechanics recommend this when my heater core went out on my 96 Lincoln and it didn't solve the problem at all if anything it only complicated it further as my perfectly working radiator ended up blowing a seal and failing a week later with minimal driving at all other than to and from parts shops and the mechanic. Bars Leak = garbage.

Worst stuff I ever got it sealed the leak but made my car over heat bad this stuff should be took off the market